/**
 * Widget Schema Viewer
 * 
 * Komponent der visualiserer en widgets metadata/schema.
 * Viser hvad widgeten kræver, leverer og kan konfigureres med.
 */

import { useState } from 'react';
import { 
  Info, 
  ArrowDownToLine, 
  ArrowUpFromLine, 
  Settings, 
  Link2, 
  Tag,
  Zap,
  Database,
  RefreshCw
} from 'lucide-react';
import { WidgetMetadata } from '@/types/WidgetSchema';
import { widgetRegistry } from '@/lib/widgetRegistry';
import { cn } from '@/lib/utils';

interface WidgetSchemaViewerProps {
  widgetId: string;
  compact?: boolean;
  className?: string;
}

export function WidgetSchemaViewer({ widgetId, compact = false, className }: WidgetSchemaViewerProps) {
  const [activeTab, setActiveTab] = useState<'requires' | 'provides' | 'config' | 'relations'>('requires');
  const metadata = widgetRegistry.get(widgetId);

  if (!metadata) {
    return (
      <div className={cn("p-4 border border-border/30 rounded-lg bg-card/50", className)}>
        <p className="text-muted-foreground text-sm">Widget metadata ikke tilgængelig</p>
      </div>
    );
  }

  if (compact) {
    return <CompactView metadata={metadata} className={className} />;
  }

  return (
    <div className={cn("border border-border/30 rounded-lg bg-card/50 overflow-hidden", className)}>
      {/* Header */}
      <div className="p-4 border-b border-border/30 bg-gradient-to-r from-primary/10 to-transparent">
        <div className="flex items-start justify-between">
          <div>
            <h3 className="font-mono text-lg text-foreground">{metadata.name}</h3>
            <p className="text-sm text-muted-foreground mt-1">{metadata.description}</p>
          </div>
          <div className="flex items-center gap-2">
            <span className={cn(
              "px-2 py-0.5 rounded text-xs font-mono",
              metadata.priority === 'critical' && "bg-destructive/20 text-destructive",
              metadata.priority === 'high' && "bg-warning/20 text-warning",
              metadata.priority === 'medium' && "bg-primary/20 text-primary",
              metadata.priority === 'low' && "bg-muted text-muted-foreground"
            )}>
              {metadata.priority || 'medium'}
            </span>
            <span className="text-xs text-muted-foreground font-mono">v{metadata.version}</span>
          </div>
        </div>
        
        {/* Tags */}
        <div className="flex flex-wrap gap-1 mt-3">
          {metadata.tags.map(tag => (
            <span key={tag} className="px-2 py-0.5 bg-secondary/50 rounded text-xs text-secondary-foreground flex items-center gap-1">
              <Tag className="h-3 w-3" />
              {tag}
            </span>
          ))}
        </div>
      </div>

      {/* Tabs */}
      <div className="flex border-b border-border/30">
        <TabButton 
          active={activeTab === 'requires'} 
          onClick={() => setActiveTab('requires')}
          icon={ArrowDownToLine}
          label="Kræver"
          count={metadata.requires.length}
        />
        <TabButton 
          active={activeTab === 'provides'} 
          onClick={() => setActiveTab('provides')}
          icon={ArrowUpFromLine}
          label="Leverer"
          count={metadata.provides.length}
        />
        <TabButton 
          active={activeTab === 'config'} 
          onClick={() => setActiveTab('config')}
          icon={Settings}
          label="Konfiguration"
          count={metadata.config.length}
        />
        <TabButton 
          active={activeTab === 'relations'} 
          onClick={() => setActiveTab('relations')}
          icon={Link2}
          label="Relationer"
          count={metadata.relations.length}
        />
      </div>

      {/* Content */}
      <div className="p-4 max-h-80 overflow-y-auto">
        {activeTab === 'requires' && (
          <div className="space-y-3">
            {metadata.requires.length === 0 ? (
              <p className="text-muted-foreground text-sm">Ingen data-afhængigheder</p>
            ) : (
              metadata.requires.map(req => (
                <div key={req.id} className="p-3 bg-background/50 rounded-lg border border-border/20">
                  <div className="flex items-center justify-between">
                    <span className="font-mono text-sm text-foreground">{req.name}</span>
                    <div className="flex items-center gap-2">
                      <span className="text-xs px-2 py-0.5 bg-primary/20 text-primary rounded font-mono">
                        {req.type}
                      </span>
                      {req.required && (
                        <span className="text-xs px-2 py-0.5 bg-destructive/20 text-destructive rounded">
                          påkrævet
                        </span>
                      )}
                    </div>
                  </div>
                  <p className="text-xs text-muted-foreground mt-1">{req.description}</p>
                  {req.refreshRate && (
                    <div className="flex items-center gap-1 mt-2 text-xs text-muted-foreground">
                      <RefreshCw className="h-3 w-3" />
                      Opdateres hver {req.refreshRate / 1000}s
                    </div>
                  )}
                </div>
              ))
            )}
          </div>
        )}

        {activeTab === 'provides' && (
          <div className="space-y-3">
            {metadata.provides.length === 0 ? (
              <p className="text-muted-foreground text-sm">Ingen outputs defineret</p>
            ) : (
              metadata.provides.map(cap => (
                <div key={cap.id} className="p-3 bg-background/50 rounded-lg border border-border/20">
                  <div className="flex items-center justify-between">
                    <span className="font-mono text-sm text-foreground">{cap.name}</span>
                    <span className="text-xs px-2 py-0.5 bg-accent/20 text-accent-foreground rounded font-mono">
                      {cap.outputType}
                    </span>
                  </div>
                  <p className="text-xs text-muted-foreground mt-1">{cap.description}</p>
                  {cap.triggers && cap.triggers.length > 0 && (
                    <div className="flex items-center gap-1 mt-2 flex-wrap">
                      <Zap className="h-3 w-3 text-warning" />
                      {cap.triggers.map(trigger => (
                        <span key={trigger} className="text-xs px-1.5 py-0.5 bg-warning/10 text-warning rounded">
                          {trigger}
                        </span>
                      ))}
                    </div>
                  )}
                </div>
              ))
            )}
          </div>
        )}

        {activeTab === 'config' && (
          <div className="space-y-3">
            {metadata.config.length === 0 ? (
              <p className="text-muted-foreground text-sm">Ingen konfigurerbare indstillinger</p>
            ) : (
              metadata.config.map(cfg => (
                <div key={cfg.id} className="p-3 bg-background/50 rounded-lg border border-border/20">
                  <div className="flex items-center justify-between">
                    <span className="font-mono text-sm text-foreground">{cfg.name}</span>
                    <span className="text-xs px-2 py-0.5 bg-secondary/50 text-secondary-foreground rounded font-mono">
                      {cfg.type}
                    </span>
                  </div>
                  <p className="text-xs text-muted-foreground mt-1">{cfg.description}</p>
                  <div className="mt-2 text-xs">
                    <span className="text-muted-foreground">Default: </span>
                    <span className="font-mono text-primary">{String(cfg.default)}</span>
                  </div>
                  {cfg.options && (
                    <div className="flex flex-wrap gap-1 mt-2">
                      {cfg.options.map(opt => (
                        <span key={String(opt.value)} className="text-xs px-1.5 py-0.5 bg-muted rounded">
                          {opt.label}
                        </span>
                      ))}
                    </div>
                  )}
                </div>
              ))
            )}
          </div>
        )}

        {activeTab === 'relations' && (
          <div className="space-y-3">
            {metadata.relations.length === 0 ? (
              <p className="text-muted-foreground text-sm">Ingen definerede relationer</p>
            ) : (
              metadata.relations.map((rel, idx) => (
                <div key={idx} className="p-3 bg-background/50 rounded-lg border border-border/20">
                  <div className="flex items-center gap-2">
                    <span className={cn(
                      "text-xs px-2 py-0.5 rounded font-mono",
                      rel.type === 'depends_on' && "bg-blue-500/20 text-blue-400",
                      rel.type === 'provides_to' && "bg-green-500/20 text-green-400",
                      rel.type === 'synchronizes' && "bg-purple-500/20 text-purple-400",
                      rel.type === 'triggers' && "bg-orange-500/20 text-orange-400",
                      rel.type === 'aggregates' && "bg-cyan-500/20 text-cyan-400"
                    )}>
                      {rel.type}
                    </span>
                    <span className="font-mono text-sm text-foreground">{rel.targetWidgetId}</span>
                  </div>
                  <p className="text-xs text-muted-foreground mt-1">{rel.description}</p>
                  {rel.dataFlow && (
                    <div className="flex items-center gap-1 mt-2 text-xs text-muted-foreground">
                      <Database className="h-3 w-3" />
                      Data: {rel.dataFlow}
                    </div>
                  )}
                </div>
              ))
            )}
          </div>
        )}
      </div>
    </div>
  );
}

// Tab button component
function TabButton({ 
  active, 
  onClick, 
  icon: Icon, 
  label, 
  count 
}: { 
  active: boolean; 
  onClick: () => void; 
  icon: React.ElementType; 
  label: string; 
  count: number;
}) {
  return (
    <button
      onClick={onClick}
      className={cn(
        "flex items-center gap-2 px-4 py-2 text-sm transition-colors",
        active 
          ? "bg-primary/10 text-primary border-b-2 border-primary" 
          : "text-muted-foreground hover:text-foreground hover:bg-muted/50"
      )}
    >
      <Icon className="h-4 w-4" />
      {label}
      <span className={cn(
        "px-1.5 py-0.5 rounded-full text-xs",
        active ? "bg-primary/20" : "bg-muted"
      )}>
        {count}
      </span>
    </button>
  );
}

// Compact view for inline display
function CompactView({ metadata, className }: { metadata: WidgetMetadata; className?: string }) {
  return (
    <div className={cn("p-2 border border-border/30 rounded bg-card/50", className)}>
      <div className="flex items-center gap-2 text-xs">
        <Info className="h-3 w-3 text-primary" />
        <span className="font-mono text-foreground">{metadata.name}</span>
        <span className="text-muted-foreground">•</span>
        <span className="text-muted-foreground">
          {metadata.requires.length} inputs, {metadata.provides.length} outputs
        </span>
      </div>
    </div>
  );
}